Unpleasant, undesirable, unfit and unhealthy are words to describe food and drink. They begin with the letter u.
Zesty is a descriptive word. Zany is a descriptive word.
Macaroni for food but I can't think of a drink
refreshments is the word
grape
Jerky
Livre
drink=imbibe
talented tiresome terrific tremendous
Rational, reasonable and righteous are positive descriptive words. They begin with the letter r.
A 9-letter word in a drink name might be Manhattan. If the word were to be plural, it is also possible to use cocktails.
tea
A descriptive word would be an adjective.